Improvement in ratchet-stops for watches and other machinery



J. D. McANLIS.

RATCHET-STOP FOR WATCHES AND OTHER MACHINERY. No.17'7,139. Patented May9,1876.

vmucssss: mvmon: -v W Q gawawd ILPETERS. PHOTO-LITKOGRAFNER. WASHINGTON.D .C.

UNITED STATES.

PATENT OE IcE.

JAMES 1). MoANLIS, or BEAVER'FALLS, PENNSYLVANIA.

IMPROVEMENT IN RATCHET-STOPS FOR WATCHES AND OTHER MACHINERY.

Specification forming part of Letters Patent No. 177, 139, dated May 9,1876; application filed April 10, 1876.

To all whom it may concern:

Be it known that I, JAMES D. lVlGANLIs, of Beaver Falls, in the countyof Beaver and State of Pennsylvania, have invented a new and ImprovedRatchet-Stop for Watches, 860., of which the following is aspecification:

The accompanying drawing represents a top view, with cap-piece detached,of my improved ratchet-stop for watches, clocks, and other mechanism.

The invention is mainly designed as a substitute for the spring-pawlsfor ratchet-wheels in watches, clocks, and other machinery in whichstrong springs and other devices have to be retained at one point ortooth of the wheel, so that the tooth click or spring is liable to breakand get worn to the injury of the watch or the spring. The device isalso applicable to ratchets of any kind, being stronger, more reliableand effective than common pawls, that act on one side of the ratchetonly.

The invention consists of a ratchet-wheel, in combination with one ormore small pinions that slide in a recessed and toothed encirclingframe,'and allow the turning of the ratchets in one direction, whilestopping them positively in the opposite direction.

In the drawing, Arepresents the ratchet of a watch, clock, or any othermachinery where at present pivot-pawls or dogs are applied. The ratchetis arranged in connection with one or more (preferably three) pinions,B, that gear with the ratchet and turn jointly with the ratchet, beingallowed to slide in recesses a of a circular band or frame, 0, extendingaround the ratchet. Thesliding and turning pinions are preferablyequidistant from each other, to bear with equal pressure on the ratchetwhen retaining the same.

The recesses a are made concentric to the pinions'at one end, butdecrease in width toward the other end, to be of less width than thediameter of the pinions. The narrower ends of the recesses are toothedto mesh with the cogs of the pinions. When the ratchet is turned in onedirection the pinions slide into the wider parts of the recesses andturn jointly with the ratchet. The ratchet is prevented from turning inopposite direction, as the pinions will be instantly carried toward thenarrower parts of the recesses, so as to produce the reliable andpositive locking of the ratchet by the joint action of the pinions onthe teeth of the ratchet, and on the teeth of the narrower recessedparts. A covering cappiece may be applied over the ratchet and pinions,and fastened by suitable screws.

The stop-pinions bear equally from different sides on the ratchet-wheeland shaft, and

.produce less wear and strain thereon, while furnishing a superior andstronger stop de vice for ratchets of all kinds.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

An improved stop device for ratchets of all kinds, consisting of thecombination of the.

ratchet-wheel with sliding and turning pinions and locking-recesses of aretaining band or ring, substantially as specified, for the purpose setforth.

JAMEs 1). MoANLIS.

Witnesses J. A. OLINE, J NO. A. B. PATTERSON.

